According to this script, Baek Si Yoon (BSY) thought Choi Chan Kyu (CCK) was dead, so he wanted to avenge him. But actually CCK was saved by the bad guys and brainwashed and trained as their killing machine. Baek Si Yoon’s revenge was getting dangerous for the bad guys, so they sent CCK to kill BSY. Although CCK lost his memory, he eventually fell under the spell of BSY again. The ending was CCK pretended to have killed BSY in order to help him to escape from the bad guys. (English translation by H.A.T.)